Edit in JSFiddle

$(function(){

    var $container = $('#container');
    $container.imagesLoaded( function() {
        $container.masonry();
    });
    
    
});

  <div id="container" class="photos clearfix"> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013039951/" title="Stanley by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4113/5013039951_3a47ccd509.jpg" alt="Stanley" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013039885/" title="Officer by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4131/5013039885_0d16ac87bc.jpg" alt="Officer" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013039583/" title="Tony by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4086/5013039583_26717f6e89.jpg" alt="Tony" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013646070/" title="Kendra by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4146/5013646070_f1f44b1939.jpg" alt="Kendra" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013039541/" title="Giraffe by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4144/5013039541_17f2579e33.jpg" alt="Giraffe" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013039741/" title="Gavin by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4153/5013039741_d860fb640b.jpg" alt="Gavin" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013039697/" title="Anita by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4113/5013039697_a15e41fcd8.jpg" alt="Anita" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013646314/" title="Take My Portrait by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4124/5013646314_c7eaf84918.jpg"   alt="Take My Portrait" /></a> 
      </div> 
    
      <div class="photo"> 
        <a href="http://www.flickr.com/photos/nemoorange/5013040075/" title="Wonder by Dave DeSandro, on Flickr"><img src="http://farm5.static.flickr.com/4089/5013040075_bac12ff74e.jpg" alt="Wonder" /></a> 
      </div> 
    
  </div> <!-- #container --> 

.photos .photo {
  width: 130px;
  margin: 5px;
  float: left;
}

.photos .photo img {
  display: block;
  width: 100%;
}